package ooday03;

//接口演示
public class InterfaceDemo {
    public static void main(String[] args) {
        // Inter 0=new Inter() ; 编译错误,接口不能被实例化
    }

}

interface Inter {
    abstract void show();

    void test();//接口中的方法默认都是抽象的,前面默认有abstract
    //void say(){}//编译错误,抽象方法不能有方法体
}

class InterImpl implements Inter {
    public void show() {

    }

    public void test() {

    }
}

//演示接口的多实现
interface Inter1 {
    void show();
}

interface Inter2 {
    void test();
}

abstract class Aoo {
    abstract void say();
}

class Boo extends Aoo implements Inter1, Inter2 {
    public void show() {
    }

    public void test() {
    }

    void say() {
    }

}

//演示接口继承接口
interface Inter3 {
    void show();
}

interface Inter4 extends Inter3 {
    void test();
}

class Coo implements Inter4 {
    public void show() {
    }

    public void test() {
    }
}